DE1240537B - Process for the production of simultaneously wear-resistant, corrosion-resistant and machinable castings made of silicon iron - Google Patents
Process for the production of simultaneously wear-resistant, corrosion-resistant and machinable castings made of silicon ironInfo
- Publication number
- DE1240537B DE1240537B DE1957J0014122 DEJ0014122A DE1240537B DE 1240537 B DE1240537 B DE 1240537B DE 1957J0014122 DE1957J0014122 DE 1957J0014122 DE J0014122 A DEJ0014122 A DE J0014122A DE 1240537 B DE1240537 B DE 1240537B
- Authority
- DE
- Germany
- Prior art keywords
- silicon
- iron
- resistant
- cupola
- cast
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C1/00—Refining of pig-iron; Cast iron
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/08—Manufacture of cast-iron
Description
Int. Cl.:Int. Cl .:
C21cC21c
DEUTSCHESGERMAN
PATENTAMTPATENT OFFICE
Deutsche Kl.: 18 b-5/00 German class: 18 b -5/00
Nummer:Number:
Aktenzeichen:File number:
Anmeldetag:Registration date:
J14122VI a/18bJ14122VI a / 18b
18. Dezember 1957December 18, 1957
18. Mai 1967May 18, 1967
30. November 1967November 30, 1967
Auslegetag:Display day:
Ausgabetag:Issue date:
Patentschrift stimmt mit der Auslegeschrift übereinThe patent specification corresponds to the patent specification
Die Erfindung betrifft ein Verfahren zur Herstellung von gleichzeitig verschleißfesten, korrosionsbeständigen und zerspanbaren Gußstücken aus Siliziumeisen. The invention relates to a method for producing at the same time wear-resistant, corrosion-resistant and machinable castings made of silicon iron.
Sie geht von einem bekannten Verfahren aus, gemaß welchem Gußstücke aus Siliziumeisen hergestellt werden, indem im Kupolofen, dessen Gattierung aus mindestens 30% Stahlschrott besteht, ein auf mindestens 1600° C überhitztes Rinneneisen erschmolzen wird, dieses überhitzte Kupolofenrinneneisen auf einen Siliziumgehalt von etwa 15% aufsiliziert wird und dann auf eine Vergießtemperatur von etwa 1400° C abgekühlt wird.It is based on a known method, according to which castings made of silicon iron are by in the cupola, the type of which consists of at least 30% steel scrap, a At least 1600 ° C overheated channel iron is melted, this overheated cupola channel iron is melted a silicon content of about 15% is siliconized and then to a casting temperature of about 1400 ° C is cooled.
Durch die Erfindung werden Gußstücke aus Siliziumeisen hergestellt, die sich gegenüber den nach dem bekannten Verfahren erhaltenen durch noch bessere Korrosionsbeständigkeit, Verschleißfestigkeit und Bearbeitbarkeit auszeichnen und darüber hinaus auch eine verbesserte Temperaturwechselbeständigkeit und Bruchfestgikeit besitzen. Diese verbesserten Eigenschaften werden gemäß der Erfindung dadurch erzielt, daß dem in der gleichen Weise wie nach dem vorstehend beschriebenen bekannten Verfahren erschmolzenen Kupolofenrinneneisen rund 2% Kalzium-Silizium und so viel Silizium zugesetzt wird, daß nach guter Vermischung durch Rühren die Schmelze rund 15% Silizium enthält. Diese Schmelze wird als Vormaterial vergossen. Dieses wird nach erfolgter Erstarrung in einem Tiegelofen, vorzugsweise unter Beigabe von Kreislaufmaterial von gleichem Siliziumgehalt, wieder aufgeschmolzen und bei einer Temperatur von etwa 1250° C zu Gebrauchsguß vergossen.By the invention castings are made of silicon iron, which compared to the after the known method obtained through even better corrosion resistance, wear resistance and machinability as well as improved thermal shock resistance and breaking strength. These improved properties are thereby achieved according to the invention achieved that the melted in the same manner as in the above-described known method Cupola channel iron around 2% calcium silicon and so much silicon is added that after thorough mixing by stirring, the melt contains around 15% silicon. This melt is called Primary material potted. This is after solidification in a crucible furnace, preferably below Addition of recycling material with the same silicon content, melted again and at one temperature cast from about 1250 ° C to cast for use.
Die Zuschläge Silizium und Kalzium-Silizium werden vorzugsweise in eine auf die entsprechende Temperatur vorerhitzte Pfanne gegeben, und man läßt danach das Eisen auf diese Zuschläge auflaufen.The additives silicon and calcium-silicon are preferably in a to the appropriate temperature given a preheated pan, and then let the iron run onto these additives.
Als besonders vorteilhaft hat es sich erwiesen, das Silizium in Haselnußgröße, dagegen das Kalzium-Silizium lediglich in einer Korngröße bis zu 3 mm zu verwenden.It has proven to be particularly advantageous to use hazelnut-sized silicon, while calcium-silicon, on the other hand, has proven to be particularly advantageous only to be used in a grain size of up to 3 mm.
Die Endzusammensetzung des bei der Temperatur von etwa 1250° C vergossenen Materials ist:The final composition of the material poured at the temperature of about 1250 ° C is:
Verfahren zur Herstellung von gleichzeitig verschleißfesten, korrosionsbeständigen und zerspanbaren Gußstücken aus SiliziumeisenMethod of making simultaneously wear-resistant, corrosion-resistant and machinable castings made of silicon iron
Patentiert für:Patented for:
Fa. Gebrüder Jellinghaus,Jellinghaus Brothers,
Kamen, Schlachthofstr. 33Kamen, Schlachthofstr. 33
Als Erfinder benannt:
Rudolf Jellinghaus, KamenNamed as inventor:
Rudolf Jellinghaus, Kamen
zieren von kohlenstoflarmen Rinneneisen außerhalb des Kupolofens bekannt.adorned by low-carbon gutter iron outside of the cupola known.
Bei diesen bekannten Verfahren handelt es sich aber um Einphasenverfahren, die zwar zu säurewiderstandsfähigem Eisensiliziumguß führen, der aber nicht die vorteilhaften Eigenschaften besitzt, das der Eisensiliziumguß aufweist, der nach dem erfindungsgemäßen Zweiphasenverfahren hergestellt wird, nämlich hinsichtlich der Korrosionsbeständigkeit bei gleichzeitiger spanabhebender Bearbeitbarkeit. Das geht z. B. aus der folgenden Untersuchung eines Probekörpers hervor:These known processes are, however, single-phase processes which, although they are acid-resistant Lead iron silicon casting, but which does not have the advantageous properties that the iron-silicon casting, which is produced by the two-phase process according to the invention, namely with regard to the corrosion resistance with simultaneous machinability. The goes z. B. from the following examination of a test specimen:
Härte 526 kg/mm2 Hardness 526 kg / mm 2
Schlagfestigkeit 0,19 kgm/cm2 Impact strength 0.19 kgm / cm 2
1. Tag 1 day
2. bis 5. Tag ..2nd to 5th day ..
Korrosionsbeständigkeit in siedenderCorrosion resistance in boiling
Salpetersäure
50 «/οnitric acid
50 «/ ο
2 800 Tage/mm 25 000 Tage/mm2,800 days / mm 25,000 days / mm
. Schwefelsäure 50Vo. Sulfuric acid 50Vo
370 Tage/mm 3700 Tage/mm370 days / mm 3700 days / mm
etwa 15 % Si,about 15% Si,
weniger als 1 %, vorzugsweise 0,6 bis 0,75 % C, höchstens 0,01 % S,less than 1%, preferably 0.6 to 0.75% C, at most 0.01% S,
Rest Eisen.Remainder iron.
Das Aufsilizieren von Kupolofenrinneneisen in der Pfanne, wobei das Rinneneisen auf das in der Pfanne befindliche Silizium aufläuft, ist bekannt. Ebenso ist auch die Zugabe von Kalzium-Silizium beim Aufsili-Die Probe ließ sich durch Hobeln mittels eines Hobelstahles Widia, Sorte HI, mit einer Schnittgeschwindigkeit von etwa 3 m pro Minute gut bearbeiten und ohne Schwierigkeiten auch auf der Flächenschleifmaschine schleifen.The siliconizing of cupola gutter iron in the pan, with the gutter iron on the one in the pan The silicon that is located is known. Likewise, the addition of calcium silicon is also included in the build-up The sample could be obtained by planing using a Widia planing steel, grade HI, at one cutting speed work well from about 3 m per minute and without any difficulties on the surface grinding machine grind.
Claims (3)
Deutsche Patentschriften Nr. 608 194, 963 061;
französische Patentschriften Nr. 681577, 631 077, 198, 713 240, 848 338;
. österreichische Patentschrift Nr. 111 879;
USA.-Patentschrift Nr. 1444 891;
E. Piwowarsky, »Hochwertiges Gußeisen«,
S. 635 bis 637, Berlin 1942.Considered publications:
German Patent Nos. 608 194, 963 061;
French Patent Nos. 681577, 631 077, 198, 713 240, 848 338;
. Austrian Patent No. 111 879;
U.S. Patent No. 1,444,891;
E. Piwowarsky, "High quality cast iron",
Pp. 635 to 637, Berlin 1942.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1957J0014122 DE1240537B (en) | 1957-12-18 | 1957-12-18 | Process for the production of simultaneously wear-resistant, corrosion-resistant and machinable castings made of silicon iron |
BE602851A BE602851A (en) | 1957-12-18 | 1961-04-21 | A process for manufacturing improved cast iron alloys containing carbon. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1957J0014122 DE1240537B (en) | 1957-12-18 | 1957-12-18 | Process for the production of simultaneously wear-resistant, corrosion-resistant and machinable castings made of silicon iron |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1240537B true DE1240537B (en) | 1967-05-18 |
Family
ID=7199324
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1957J0014122 Pending DE1240537B (en) | 1957-12-18 | 1957-12-18 | Process for the production of simultaneously wear-resistant, corrosion-resistant and machinable castings made of silicon iron |
Country Status (2)
Country | Link |
---|---|
BE (1) | BE602851A (en) |
DE (1) | DE1240537B (en) |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1444891A (en) * | 1920-07-16 | 1923-02-13 | Walter Richard | Method for making acid-proof alloys |
FR631077A (en) * | 1926-03-18 | 1927-12-14 | A process for making a premium iron or steel of any desired carbon content | |
AT111879B (en) * | 1926-05-12 | 1928-12-27 | Esslingen Maschf | Process for the production of highly acid-resistant castings. |
FR681577A (en) * | 1928-10-27 | 1930-05-16 | Anciens Ets Skoda | Manufacturing process of acid-resistant ferro-silicon alloys |
FR713240A (en) * | 1931-03-14 | 1931-10-23 | Bamag Meguin Ag | Process for obtaining iron with a high silicon content |
FR713198A (en) * | 1931-03-13 | 1931-10-23 | Bamag Meguin Ag | Process for obtaining acid resistant iron |
DE608194C (en) * | 1933-07-06 | 1935-01-17 | Isabellen Huette G M B H | Process for the production of acid-resistant silicon-iron castings |
FR848338A (en) * | 1938-07-06 | 1939-10-26 | Erim S A | Method and apparatus for the preparation of refined pigs |
DE963061C (en) * | 1953-01-09 | 1957-05-02 | Eisenwerke Muelheim Meiderich | Process for producing a fine graphitic, low-carbon, silicon-containing, low-phosphorus and low-sulfur pig iron |
-
1957
- 1957-12-18 DE DE1957J0014122 patent/DE1240537B/en active Pending
-
1961
- 1961-04-21 BE BE602851A patent/BE602851A/en unknown
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1444891A (en) * | 1920-07-16 | 1923-02-13 | Walter Richard | Method for making acid-proof alloys |
FR631077A (en) * | 1926-03-18 | 1927-12-14 | A process for making a premium iron or steel of any desired carbon content | |
AT111879B (en) * | 1926-05-12 | 1928-12-27 | Esslingen Maschf | Process for the production of highly acid-resistant castings. |
FR681577A (en) * | 1928-10-27 | 1930-05-16 | Anciens Ets Skoda | Manufacturing process of acid-resistant ferro-silicon alloys |
FR713198A (en) * | 1931-03-13 | 1931-10-23 | Bamag Meguin Ag | Process for obtaining acid resistant iron |
FR713240A (en) * | 1931-03-14 | 1931-10-23 | Bamag Meguin Ag | Process for obtaining iron with a high silicon content |
DE608194C (en) * | 1933-07-06 | 1935-01-17 | Isabellen Huette G M B H | Process for the production of acid-resistant silicon-iron castings |
FR848338A (en) * | 1938-07-06 | 1939-10-26 | Erim S A | Method and apparatus for the preparation of refined pigs |
DE963061C (en) * | 1953-01-09 | 1957-05-02 | Eisenwerke Muelheim Meiderich | Process for producing a fine graphitic, low-carbon, silicon-containing, low-phosphorus and low-sulfur pig iron |
Also Published As
Publication number | Publication date |
---|---|
BE602851A (en) | 1961-08-16 |
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